As the need continues to grow for specialized acceleration more companies turn to in-home-designed custom ASIC. If you are willing to invest the resources into this, ASIC is the ultimate way to get this done. But ASIC is expensive to design and expensive to produce. It requires a large design team and takes a lengthy amount of time from idea to final chip. That's where the problem lies, not every organization might have the resources necessary to go this route, and not every organization may want to deal with a whole development team.
In mid-2018 Intel acquired a company called eASIC. By late that year, eASIC was consequently integrated into Intel's Programmable Solutions Group (PSG), the group responsible for the development of their FPGAs and other programmable devices.